Sheet carrier control mechanism



Feb. 2, 1932. w, KARLS ET AL 1,843,770

slmfi'b CARRIER. CONTROL MECHANISM 'Filed March 29, 1950 s Sheets-Sheet1 INVENTQBS WILLIANLNKAR L-S ILL\AM.BOU CHER ATTORNEY Feb. 2, 1932. w.N. KARLS ET AL SHEET CARRIER CONTROL MECHANISM F iled March 29, 1950 3Sheets-Sheet 2 INV'ENTORS WlLLIAM.N-KARL5 WILLIAM BOUCI'IER *AITO VNE sFeb. 2, 1932.- w. N. KARLS ET AL 1,843,770

SHEET CARRIER CONTROL MECHANISM Filed March 29, 1930 3 Sheets-Sheet 3 IG 4 WILLIAM.N.KARLS E w| LLIAMB OUCH ER fin 0% AT TURN E S Patented Feb.2, 1932 Urn ST TE PATENT ()FFICE WILLIAM N; KARLS AND WTLLIAM BOUGHER,OF THREE RIVERS, QUEBEC, CANADA S EET CARRIER colvrnon MECHANISMApplicationfiled March 29, 1930. Serial No. 440,012. r

- This invention relates to a carrier control mechanism for machines inwhich a travelling carrier is employed to guide or carry a 1, sheetofmaterial-into engagement with rolls, or'cylinders over which saidsheet must pass during the process of manufacture.

In a paper making machine, for example,- continuously travelling ropecarriers are employed to carry thepapersheet through the various pressand drier sections. Although these rope carriers are needed principallyfor starting purposes, or when a break occurs in the paper, they areinvariably arranged to.

travel continuously during operation of the paper making machine. Thewear incident to continuous travelling of'the carrier ropes in contactwith the press or drier rolls isithe cause of considerable operating andother losses due to the necessity of frequently stop} ping the machineto repair or replacefthe broken, damaged or worn out ropes.

The present invention has been designed to eliminate this difficulty andconsists in the provision of means whereby thetravelling and analogousmachines is automatically ar rested when the ropes have completed theirfunction of guiding the sheet of paper or other material into engagementwith the various rolls over which the sheet is'intended to travel. Meansare also provided toenable the travel of the carrier ropes to bearrested at the will of the machine operator.

In the present instance, the invention will be described with referenceto its application to the third press section of a newsprint papermaking machine. It will be understood how'- ever that the invention, ashereinafter deapplied to the first or second presssections;

to a more detailed discus sion of the invention, reference will be hadto the accompanying drawings, wherein Figure 1 is a fragmentarysideelevation of motion of the rope carriers paper making scribed, or withslight modifications, may be sheave 17 to a pulley the third presssection of a newsprint paper making machine, having our inventionapplied thereto.

Flgure 2 is a sectional view taken on the line 2-2 of Figurel, certainparts being omitted for the sake of clearness.

Figure 8 is an enlarged fragmentary view, partly in side elevationandpartly in vertical section, of an automatic control mechanismemployed for arresting the travelling movement of the carrier ropes whenthe paper guiding operation is completed. Y

Figure tis a plan view showing the manner in which the'control mechanismillustrated in F igure'3 is operatively connected to one of the feltrolls' of a paper making machine.

" Figure 5 is a fragmentary side elevation of the arrangement shown inFigure 4 with certain parts omitted for the sake of clearness; V r 7F'igures 6, 7 and38 are side, plan and end views, respectively, ofasuction head forming part ofthe automatic control mechanism disclosedin Figure 3'.

' In accordance wlth this invention, a felt rollf5 of the dryer sectionis equipped with a pulley 6. This pulley, by means of a belt 7, drivesa-pulley 8 on the shaft 9. A friction gear 10, fixed to the shaft 9,engages a complementary friction gear 11 fixed to a shaft 12.. Drivesheaves 13' and 14 are keyed to shaft 12 and serve to drive the, carrierropes 15 and 16 which travel in the direction indicated' by the appliedarrows in Figure v1. The rope 15 travels fromthe-drive sheave 13beneath'a guide sheave 17 and-thence up wardly tola felt roll 18positioned between the third press section A and the second presssection B. From felt. roll 18 the rope 15 travels around the felt rolls19'and 20 of the third press section. After leaving roll 20, the rope 15travels over idle pulleys 21, mounted at one end of the upper press roll22, and from thence over felt roll 23, to the idler pulleys24 mounted atone end of the drying roll 25. After leaving the idler pulleys'24, therope 15*passes beneath a tensioning pulley 26 back to the drive sheave13. The companion rope 16 passes from the guide 28 located at the top ofthe third press section. From pulley 28, the rope 16 passes downwardlyaround an intermediate pulley 29 to a lower pulley 30. After passingbeneath said pulley 30, the rope 16 follows the same path as rope 15 tothe idler pulleys 24. From the pulleys 24, the rope 16 passes beneath atensioning pulley 31 back to the drive sheave 14.

The paper coming from the second press section B, as indicated at K, iscaught between the travelling ropes 15 and 16'and is thereby carriedthrough the third press section until it reaches the drying roll'25;From this point on, the paper is taken care of by the driers in theusual manner.

After the ropes 15 and 16 have performed their function of guiding thepaper through the third press section, the travelling movement of theropesis discontinued by separat ing the friction drive gears 10 and 11.Provision for separating these gears 10 and 11 both automatically andmanually is made in the following manner.

As shown to advantage in Figures 3 to 5 inclusive, shaft 9 is iournalledin stationary bearings 34 carried by a pair of brackets 35 suspendedfrom the framing A of the third presssection A. Shaft 12 is journalledin bearings 36 carried by a vertically slidable plate 37. This plate 8?slides in suitable guides 38 on the brackets 35. A lever 39 isintermediately pivoted at 40 to one of the brackets 35. One end of thislever is at-, tached to the plate 37, while the other end is attached.by a vertical stem 41, to the diaphragm 42 of a suitably supportedliquid reservoir 48, Whichcommunicates with a-vaouum chamber 44 equippedwith a liquid gauge 45. The top of the vacuum chamber is connected bysuitable fittings to pipes 46, 47 and'48. Pipe 46 leads to a watersupply (not shown) and is equipped with ash-ut ofi valve 49. Pipe 47leads to a vacuum pump (not shown) and is equipped with a control valve50. Pipe 48 connects vacuum chamber 44 to a suction head 51 and isequipped witha branch 52 which may be opened to the atmosphere through avalve 53. The suction head 51 is provided with a vacuum chamber 54 whichcommunicates with themai-n vacuum chamber 44 via the pipe'48. Oneside ofvacuum chamber 54 is formed by a removable face plate 55, provided withopenings 56 and held in place by bolts 57. Between the branch connection52 and the main vac uum chamber 44, pipe 48 is equipped with an airfilter or dustcollector 58, Said filter or collector 58 includes afitting 59 having an inlet 60 and an outlet 61 separated by a par tition62 having an opening formed therein. The inlet 60 communicates with atubular dust receiver 63 which surrounds a tubular screen or strainer 64having its upper end supported in the opening ofpartition 62 andcommunicating with outlet61.

The complete operation of the invention will now be described withreference to the guiding or carrying of the paper sheet from the secondpress section B through the third press section A. In accordance withpresent practice, a narrow strip or ribbon of the paperis initiallyengaged between the ropes 1'5 and 16 but, as the guiding of the paperprogresses, this ribbon or strip is gradually widened to the full widthof the paper web. Atithe beginning ofthe pa-per uiding operation, thesuction head 51, which is positioned as shown to advantage in Figures 1and 2, is open to the atmosphere. This permits atmospheric pressure toact through the pipe 48 andto depress the water level in vacuum chamber44. UpW-ardpressure is thus exerted on diaphragm 42 and stem 41 to movelever 39in the direction necessary to lower the friction gear 11 intoengagementwith the driving gear 10,7vhereby motion is imparted to thecarrier ropes l5and 16. As theguiding of thepaper through the thirdpress section is completedand the paper widens to its full width, theopenings 5 of suction head 51 are sealed by. contact withthepaper webpass ing ther'eover. This sealing of the suction headdisruptscommunication between the atmosphere-and the vacuum chamber 44so that a vacuum is established said chamber 44 through the agency ofthe vacuum ,pipe 47. The pull of the vacuum thus createdin chamber 44causes the diaphragm 42 to move downwardly with the result that the stem41 and lever 39 are actuated in a direction to lift the plate 37,. thusseparating friction gears 10 and ll and rresting the travelling movementof -ropes 15 and 16. 7

Any dust that may be created by contact of'thefpaper sheet or web withthe suction liead til is prevented by the filter or dust collecto'r 58from entering and clogging the valve 50 and vacuum ,pipe 4 7.

Should the functioningof thesuction head 51-be temporarily interferedwithby clogging of the openings 56, the valve 53, in branch pipe 52, maybe opened to permitatmospheric pressure to act on the water contained invacuum chamber 44. This enables the ropes 15 and 16 to be break occursin the paper, even though the suction head41is not functioning properly.Any suitable means, such as a valve inserted in the pipe 48,.may beprovided to enable the stopping of the ropes 15 and 16 to be controlledat the will of the machine operator. The-closure of such a valvemanually would have the same effect as the sealing of the openings 56inthe suction head 51.

ile in the foregoing we have disclosed what we now consider tobe thepreferred embodiment of our invention, it will be understood thatthe,prin'ciplesin-volve d maybe reduced to practice in various other ways.For example, various means, other than the-speset inoperation whenever.a

Ill 0 cific means herein described, may be'found carrier when thewaforesaid 'leading. of the suitable for controlling engagement anddisengagement of the friction drive gears 10 and 11. Likewise, thesefriction drive gears 10 and 11 may be supplanted by other suitabledevices for establishing and disrupting a drive connection between thecarrier ropes and the paper making machine or other source of power. Allsuch modifications as fall within the scope of the appended claims areconsidered within the purview of our invention.

Having thus described our invention, what we claim is 1. The combinationwith a series of rolls and a travelling carrier functioning to guide asheet of material into engagement with said rolls, of means co-actingwith said sheet to cause travelling motion of the carrier to cease at apredetermined time.

2. The combination with a machine, including a series of rolls and atravelling carrier for guiding a sheet of material into engagement withsaid rolls, of means functioning automatically to establish and disrupta drive connection between said carrier and,

a driving means therefor.

3. The combination with a series of rolls and a carrier for guiding asheet of material into engagement with said rolls of means functioningautomatically, in co-operation with said sheet, to establish or disrupta drive connection between said carrier and a source of power dependentupon operating conditions.

i. The combination with a carrier for guiding a sheet of material intoengagement with a series of rolls, of power operated means forestablishing and disrupting a drive connection between said carrier anda carrier driving member.

5. The combination with a carrier for member and carrier, said meansincluding provision for manual control thereof.

. 7. The combination with a paper machine equipped with a power drivencarrier for leading the paper sheet through the machine when starting upor following breakage of the sheet of an automatic carrier controlmechanism functioning to efiect actuation of the carrier when conditionsrender it necessary to lead the sheet through the machine and todiscontinue further operation of the sheet is completed.

-- v8; The combination witha series ofrolls and a travelling carrier forguiding a sheet of material into engagement with said rolls of a fluidpressure responsive device controlling the functioningof saidcarrier.

9. The combination with a series of rolls andatravelling carrier forguiding a sheet of material into engagement with said rolls of means,lncludmg aflllld pressure'responsive device, for automaticallyestablishing and disrupting a drive connection between the carrier and-adriving means therefor. r

'10. The combination with a series of rolls aiid a travelling carrierfor guiding a sheet of'materialinto engagement with said rolls oft-meansfor automatically controlling the startingand stopping :of said carrier,said means including a pressure responsive device for establishing anddisrupting a drive connection between the carrier and a source of powerand a control member serving, in cooperation with said sheet, to controlthe V actuation of the pressure responsive device.

11. An automatic sheet carriercontrol mechanism for paper making andanalogous machines comprising a differential pressure device forestablishing and disrupting a drive connection between the carrier and adrive member therefor, said device including a source of suctionand asuction head connected therewith, said head having openings to theatmosphere positioned to be sealed by the'sheet only'when'the full widthof the sheet is passing through the machine and means responsive tothesealing and unsealing of said openings for controllingthe action ofsaid device.

12. An automatic sheet carrier control mechanism of the characterdescribed comprising a differential pressure device for establishing anddisrupting a drive connection between the carrier and a drive mechanism,said device including a vacuum chamher and means for establishing anddisruptmg communication between said chamber and the atmosphere tocontrol the actuation of said device.

13. sheet carrier control mechanism of the character describedcomprising a holder containing a columnof liquid, means responsive tothe normal head pressure of the liquid for establishing "a driveconnection between the carrier anda drive mechanism therefor, and meansfor creating a suction effect in a portion of theholderto reduce theeffective head pressure of the liquid and thereby dis rupt said driveconnection.

14. A sheet carrier control mechanism of the class described comprisinga pressure chamber, means for varying the pressure conditions withinsaid chamber and means responsive to the pressure variations within saidchamber for establishing and disrupting a "drive eonnection between thecarrier and a source of power.

'15. An autom'atic sheet carrier, control m'ehanism "for paper making vand 'analogous 6 machines comprising'a drive gearfadrlven gear, carrierpropelling means-actuated from the drive11rgear,=0ne f saidrgears beirigm0vable into and ou't of vengagem'ent with the etherya pressureresponsivedeV-iee for mov- 7w ing said movable gear and means forcontrolling the action 0f said'rdevi'ce.

16. The combination with "a carrier for guiding a :sheet" of materialinto engagement With a series of rolls of a-barrierrcontrdl mechanismineluiling: a drive gear, a driven gear, carrier: propelling meansactuated -from the driven "gear and means, including said sheet, "for"automatically effecting engagement 'an'ctdisengagement of s'aid gears.

InWitness whereof, We hRV'QhBI'GUHtOiSGt our'hands.

WILLIAM N. KARL'S. V WV ILLIAM BOUOHER.

